


abstract class Teacher{

    public int a=0;
    public  abstract void fun1();
    public void fun2(){
        System.out.println("11");
    }

    interface Animal{
        default void fun1(){
            System.out.println("abc");
        }
        public static final int a=2;

        public abstract void fun2();
    }

}

public class Test6 {

    public static void main1(String[] args) {

        int a=10;
        int b =20;
        System.out.println(a+b+"ac");
        System.out.println("ac"+a+b);
    }
}
